Short Life Expectancy Mastery Achievement

Tips - This is another one of those Mastery Achievements that is almost too easy. When doing the mission ensure your Mutalisks have the upgrade so they do bonus damage versus armor. Start building Mutalisks the moment you can and by the time Tyrannozor spawns you should have around 12-15 Mutalisks. Send them directly to him and attack. The bonus damage versus armor will rip through his health in a matter of seconds.